(function($) {
	$.extend($, {
		fileUpload: function(options) {
			var para = {
				multiple: true,
				filebutton: ".filePicker",
				uploadButton: null,
				url: "/home/MUploadImg",
				filebase: "mfile", //mvc后台需要对应的名称
				auto: true,
				previewZoom: null,
				uploadComplete: function(res) {
					console.log("uploadComplete", res);
				},
				uploadError: function(err) {
					console.log("uploadError", err);
				},
				onProgress: function(percent) { // 提供给外部获取单个文件的上传进度，供外部实现上传进度效果
					console.log(percent);
				},
			};
			para = $.extend(para, options);

			var $self = $(para.filebutton);
			//先加入一个file元素
			var multiple = ""; // 设置多选的参数
			para.multiple ? multiple = "multiple" : multiple = "";
			$self.css('position', 'relative');
			$self.append('<input id="fileImage" style="opacity:0;position:absolute;top: 0;left: 0;width:100%;height:100%" type="file" size="30" name="fileselect[]" ' + multiple + '>');

			var doms = {
				"fileToUpload": $self.parent().find("#fileImage"),
				// "thumb": $self.find(".thumb"),
				// "progress": $self.find(".upload-progress")
			};
			var core = {
				fileSelected: function() {
					var files = (doms.fileToUpload)[0].files;
					var count = files.length;
					console.log("共有" + count + "个文件");
					for(var i = 0; i < count; i++) {
						var item = files[i];
						console.log(item.size);
						if(para.auto) {
							core.uploadFile(item);
						}
						core.previewImage(item);
					}
				},

				uploadFile: function(file) {
					console.log("开始上传");
					var formdata = new FormData();

					formdata.append(para.filebase, file); //这个名字要和mvc后台配合

					var xhr = new XMLHttpRequest();
					xhr.upload.addEventListener("progress", function(e) {

						var percentComplete = Math.round(e.loaded * 100 / e.total);
						para.onProgress(percentComplete.toString() + '%');
					});
					xhr.addEventListener("load", function(e) {
						para.uploadComplete(xhr.responseText);
					});
					xhr.addEventListener("error", function(e) {
						para.uploadError(e);
					});

					xhr.open("post", para.url, true);
					//xhr.setRequestHeader("X_FILENAME", file.name);
					xhr.send(formdata);
				},
				uploadFiles: function() {
					var files = (doms.fileToUpload)[0].files;
					for(var i = 0; i < files.length; i++) {
						core.uploadFile(files[i]);
					}
				},
				previewImage: function(file) {
					if(!para.previewZoom) return;
					var img = document.createElement("img");
					img.file = file;
					$(para.previewZoom).append(img);
					// 使用FileReader方法显示图片内容
					var reader = new FileReader();
					reader.onload = (function(aImg) {
						return function(e) {
							aImg.src = e.target.result;
						};
					})(img);
					reader.readAsDataURL(file);
				}
			}
			doms.fileToUpload.on("change", function() {
				//doms.progress.find("span").width("0");
				console.log("选中了文件");
				core.fileSelected();
			});

			console.log("初始化!");
			//绑定事件

			$(document).on("click", para.filebutton, function() {
				console.log("clicked");
				//doms.fileToUpload.click();
			});
			if(para.uploadButton) {
				$(document).on("click", para.uploadButton, function() {
					core.uploadFiles();
				});
			}
		}
	});
})(Zepto);